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VII/289 SDSS quasar catalog, sixteenth data release (DR16Q) (Lyke+, 2020)
The following files can be converted to FITS (extension .fit or fit.gz)
dr16q.dat dr16qdup.dat superset.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=VII/289
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Beginning of ReadMe :VII/289 SDSS quasar catalog, sixteenth data release (DR16Q) (Lyke+, 2020)
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The Sloan Digital Sky Survey Quasar Catalog: Sixteenth Data Release.
Lyke B.W., Higley A.N., McLane J.N., Schurhammer D.P., Myers A.D.,
Ross A.J., Dawson K., Chabanier S., Martini P., Busca N.G.,
du Mas des Bourboux H., Salvato M., Streblyanska A., Zarrouk P., Burtin E.,
Anderson S.F., Bautista J., Bizyaev D., Brandt W.N., Brinkmann J.,
Brownstein J.R., Comparat J., Green P., de la Macorra A.,
Munoz Gutierrez A., Hou J., Newman J.A., Palanque-Delabrouille N.,
Paris I., Percival W.J., Petitjean P., Rich J., Rossi G., Schneider D.P.,
Smith A., Vivek M., Weaver B.A.
<Astrophys. J. Suppl. Ser., 250, 8 (2020)>
=2020ApJS..250....8L
=2020yCat.7289....0L
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ADC_Keywords: Surveys ; QSOs ; Spectra, optical ; Redshifts ;
Cross identifications
Keywords: Catalogs ; Surveys ; Quasars ; Cosmology ;
Large-scale structure of the universe ; Observational cosmology
Abstract:
We present the final Sloan Digital Sky Survey IV (SDSS-IV) quasar
catalog from Data Release 16 of the extended Baryon Oscillation
Spectroscopic Survey (eBOSS). This catalog comprises the largest
selection of spectroscopically confirmed quasars to date. The full
catalog includes two subcatalogs (the current versions are DR16Q_v4
and DR16Q_Superset_v3 at http://data.sdss.org/sas/dr16/eboss/qso/DR16Q):
a "superset" of all SDSS-IV/eBOSS objects targeted as quasars
containing 1,440,615 observations and a quasar-only catalog containing
750,414 quasars, including 225,082 new quasars appearing in an SDSS
data release for the first time, as well as known quasars from
SDSS-I/II/III. We present automated identification and redshift
information for these quasars alongside data from visual inspections
for 320,161 spectra. The quasar-only catalog is estimated to be 99.8%
complete with 0.3%-1.3% contamination. Automated and visual inspection
redshifts are supplemented by redshifts derived via principal
component analysis and emission lines. We include emission-line
redshifts for Halpha, Hbeta, MgII, CIII], CIV, and Lyalpha.
Identification and key characteristics generated by automated
algorithms are presented for 99,856 broad absorption-line quasars and
35,686 damped Lyman alpha quasars. In addition to SDSS photometric
data, we also present multiwavelength data for quasars from the Galaxy
Evolution Explorer, UKIDSS, the Wide-field Infrared Survey Explorer,
FIRST, ROSAT/2RXS, XMM-Newton, and Gaia.
Description:
In this paper, we detail DR16Q, the final SDSS-IV/eBOSS quasar catalog.
The catalog consists of two subcatalogs: the DR16Q superset containing
1440615 observations targeted as quasars, and the quasar-only set
containing 750414 quasars. The quasar-only catalog includes 225082 new
quasars observed after the release of DR14Q, a 42% increase in the
catalog size. We estimate the quasar-only catalog to be 99.8% complete
with 0.3%-1.3% contamination. We include automated pipeline redshifts
for all quasars observed as part of SDSS-III/IV and confident visual
inspection redshifts for 320161 quasars.
Spectroscopy for SDSS-IV/eBOSS was conducted using the BOSS
spectrographs on the 2.5m Sloan Telescope. Two spectrographs each
recorded data from 500 fibers on a 2k CCD with square 24um pixels and
a wavelength range of 3600-10400AA at a spectral resolution of
lambda/Deltalambda 2000.
DR16Q includes spectra obtained using both the BOSS spectrographs and
the SDSS-I/II spectrographs (3800-9100AA) and SDSS-III/BOSS over the
four SDSS campaigns (MJD 51608-58543; March 2000-March 2019).